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mPower 300 Series (Rev G)
Element
Description
HMI Lock
Activates the HMI lock. See
for details
5.4.4 Adjustment limits
By default, all set values (U, I, P) are freely adjustable from 0 to 102%
of the rated value.
This may be obstructive in some cases, especially for protection of
applications against overcurrent. Therefore upper and lower limits for
current and voltage can be set which limit the range of the adjustable
set values. For power only an upper value limit can be set.
These limits apply to every kind setting a value. That also includes remote control via analog or digital interface. In remote
control, the global range of 0–100% (digital) resp. 0–5 V / 0–10 V remains, only narrowed by the limits defined here.
An example: you would define the limits for a model with 80 V, 120 A and 3 kW as depicted in the screen above, with
U-min = 10V and U-max = 75 V. In analog remote control, the active control voltage range for mode 0–10 V results as
1.25 V–9.375 V. As soon as the system is switched to analog remote control, it would put out minimum 10V, even there is
nothing connected to voltage control input VSEL.
Beyond those limits, values given by digital commands are not accepted and will return an error (when using SCPI). Values
given from analog control voltages are ignored (clipping).
►
How to configure the adjustment limits
1. Switch off the DC output and push button
to call the setup menu.
2. Push button
to call submenu
Settings
. In the submenu navigate to
Limits
and push
again.
3. In the screen you can now adjust the settings I-min, I-max, U-min, U-max and P-max with the rotary knobs. Switch-
ing between values for current and power is done with the arrow buttons
and
.
4. Accept the settings with
or discard them with
.
The adjustment limits are coupled to the set values. This means that the upper limit (-max) may not
be set lower than the corresponding set value. Example: If you wish to set the limit for the current set
value I-max to 90 A while the currently adjusted current set value is 100 A, then the set value first
would have to be reduced to 90 A or less.
The same applies vice versa when adjusting I-min.
